JP2948474B2 - Oscillating body neutral position holding mechanism and reciprocating transport body detecting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for holding a rocking member in a neutral position and a mechanism for detecting a reciprocating transfer member.

[0002]

2. Description of the Related Art Detecting means is used to detect the transfer of a transfer body. In the card reader, the transfer body corresponds to a card serving as an information medium. The card is transferred in the reciprocating direction, and the transfer is detected by the detecting means to process information. An example shown in FIG. 5 is conventionally known as a means for detecting in such a reciprocating direction. FIG. 5 (a)
FIG. 5B is a side view of the detecting means, and FIG. 5B is a front view of the detecting means.

In the technique shown in FIG. 5, an intermediate portion of a lever 1 is swingably supported by a stationary member 3 via a shaft 2 and is urged to rotate by a torsion coil spring 4. The rotation of the lever 1 by the spring is prevented by the one end of the lever abutting against a stopper 5 formed on the immobile member 3.

When the lever 1 is locked by the stopper 5, a part of the lever 1 blocks the optical axis 6 of the optical sensor and closes the optical path of the optical sensor. The other end of the lever 1 is formed in a chevron, so that even if a card as an information medium advances from any direction of reciprocation as shown by an arrow 7, the chevron of the lever 1 is gradually pushed down and passes. I can do it.

Accordingly, an operation is performed in which the sensor optical axis shifts from the closed state to the opened state as the card passes, and returns to the closed state again. This operation is performed in the forward and backward movements of the card, and the passage of the card is detected by the optical sensor.

[0006]

In such a detecting means, the lever 1 (oscillator) is used in a state where no card comes.
It is premised that the lever 1 is stabilized at the neutral position. However, in the configuration of the conventional detection means, the size of the lever 1 is large because a part of the lever 1 has a mountain shape, and the detection means itself has to be enlarged. And there is a problem that the arrangement is restricted.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a simple and compact structure for holding a rocking body at a neutral position, and to provide a downsized reciprocating body detecting mechanism.

[0008]

In order to achieve the above object, the present invention is configured as follows.

(1). An oscillating body whose intermediate position is swingably supported on a stationary member by a support portion, and first biasing means for rotating and biasing the oscillating body in a first direction about the support portion; A second biasing member for rotating the rocking body in a second direction opposite to the first direction about the support portion;
Of the oscillating body with respect to the neutral position of the oscillating body in the range of the oscillating body centered on the support portion. A stopper that restricts the swinging body in the direction area to restore the oscillating body rotated in the first direction from the neutral position by the magnitude of the urging force of the second urging means. The size is set to be sufficient but not enough to rotate the rocking body in the second direction beyond the neutral position against the urging force of the first urging means. 1).

(2). A detection lever that includes an engagement portion that engages with a transfer body that is reciprocally transferred on the transfer path and a detection unit that cooperates with a sensor that detects the transfer of the transfer body, and a detection lever that is rotatably supported in forward and reverse directions, A first elastic body having a strong urging force, and a second elastic body having a weak urging force, for urging the detection lever in both forward and reverse directions; The locking portion formed at one end of the detection lever is brought into contact with the fixed stopper portion, and the one end of the detection lever is brought into contact with the locking portion by the urging force of the second elastic body.

(3). In (2), the transfer body is a card (claim 3).

(4). In (2), the sensor is an optical sensor (claim 4).

[0013]

When the oscillating body receives an external force and rotates in one direction from the neutral position and the external force is removed, the oscillating body is restored to the neutral position by a strong spring. When the oscillating body receives the external force and turns to the other side and the external force is removed, the oscillating body is restored to the neutral position by a weak spring. Since the strong spring is restricted by the stopper, the rocking body cannot be rocked to the other side from the neutral position. Weak spring is held positioned in the neutral position the oscillator giving a biasing force of the neutral position orientation on the oscillator.

[0014]

【Example】

1. Embodiment 1 In FIG. 1, an elongated plate-shaped rocking body 10 is provided with a shaft 11 constituting a support portion at an intermediate position thereof as a non-illustrated immovable member.
It is swingably supported by. The direction indicated by arrow A around the axis 11 is referred to as a first direction, and the direction indicated by arrow B is referred to as a second direction. The second direction has an opposite relationship to the first direction. The free ends of the leaf springs 12 and 13 whose base ends are fixed to the immovable member 14 are in contact with the rocking body portion above the shaft 11, respectively.

The leaf spring 12 is a first biasing means, and has a biasing force for rotating the rocking body 10 in the direction of the arrow A. This biasing force acts on the stopper 15, whereby The displacement of the spring 12 is prevented. The leaf spring 13 is a second urging means and has an urging force for rotating the rocking body 10 in the direction of arrow B. The force of the leaf spring 13 is set to be smaller than the force of the leaf spring 12. The oscillator is pressed against the leaf spring 12 and the oscillator is
It cannot be moved in the direction of. The position of the oscillating body 10 pressed against the leaf spring 12 is referred to as a neutral position.

As described above, the magnitude of the urging force of the leaf spring 13 is sufficient to restore the rocking body 10 rotated in the direction of the arrow A from the neutral position. The swinging body 10 is set to a size that does not allow the swinging body 10 to rotate in the direction of the arrow B beyond the neutral position in opposition to the above. It is freely rotatable in the direction, but when the external force is released, the spring automatically returns to the neutral position by the action of each spring.

At a position lower than the shaft 11 of the oscillator 10 in the neutral position, the light emitting element 16
a, a pair of optical sensors 16 including a light receiving element 16B are fixed to an immovable member such that their optical axes are shielded by the oscillating body.

On the other hand, the upper part of the rocking body is moved in the transfer direction of the transfer body so that the transfer body and the rocking body are smoothly engaged during the transfer of the transfer body in the direction shown by the arrow 17. The facing part is chamfered.

When a transfer member (not shown) is transferred in the direction shown by arrow 17, in the process of this transfer, the transfer member interferes with the oscillating body and passes while giving an inclination. That is, the oscillating body is rotated about the axis 11, and the oscillating body is displaced from the optical axis of the optical sensor 16 to detect the passage of the transfer body. When the transfer body further moves and the transfer body comes off the oscillating body, it is transferred to the transfer body.
The external force is released and the oscillator automatically returns to the neutral position.
I do.

In this embodiment, since the oscillating body is formed of a rod-shaped member instead of a roof-shaped member as in the conventional case, it does not occupy a large space as in the conventional case, and a small-sized device can be formed by a simple structure. There are advantages that can be done.

Example 2 The first urging means and the second urging means
A leaf spring was used for the urging means, but instead of the leaf spring,
This example uses a torsion coil spring. FIG. 2 is an assembly diagram illustrating a main part of the neutral position holding mechanism according to the present embodiment, and FIG.
FIG. 2 is an exploded perspective view of the main part.

In these figures, the elongated rocking body 50 is swingably supported at its intermediate position by a stationary member consisting of a main body 64 via a shaft 51 serving as a supporting portion. This axis 51
For assembling the main body 64, the shaft 51 is pushed out by using the elasticity of the slit 60 formed in the shaft support portion of the main body, and is rotatably inserted into a hole formed on the main body side for shaft support. Performed by

At the time of this assembling, a torsion coil spring 52 as a first urging means and a torsion coil spring 53 as a second urging means are inserted into one side and the other side of the shaft 51 in advance, respectively. Then it is inserted into the main body and assembled.

In this assembled state, the one end 52a of the torsion coil spring 52 is engaged with the groove-shaped spring positioning portion 64a formed on the upper surface of the main body 64, and the other end 52b.
Is a first locking projection 5 formed near the supporting portion of the rocking body 50.
0a, and further extended to abut against a stopper 64b formed by the wall of the main body 64. Since the torsion coil spring 52 has a closed leg habit, the spring is biased so as to press a spring positioning section 64a and the stopper 64b.

The oscillating body 50 has an arrow A about the axis 51.
And a second direction indicated by an arrow B, and the second direction is opposite to the first direction.

The oscillating body 50 is moved from the position where the first locking projection 50a abuts on the other end 52b, ie, the neutral position to the arrow B position.
When it is turned in the direction of, the biasing force of the torsion coil spring 52 acts to restore the neutral position, but this biasing force does not extend beyond the position where the other end portion 52b contacts the stopper 64b.

On the other hand, one end 53a of the torsion coil spring 53 is locked by a stopper 64b of the main body 64, and the other end 53b is locked by a second locking projection 50b formed near the supporting portion of the rocking body 50. Have been. Since the torsion coil spring 53 has a leg opening behavior in which both ends of the spring open,
The spring urges the rocking body 50 to rotate in the direction shown by the arrow B. However, the force of the torsion coil spring 53 is weaker than the force of the torsion coil spring 52, and does not exceed the neutral position of the oscillator 50 to rotate the oscillator in the direction of arrow B. It has a moderate strength that can be held in the neutral position.

As described above, the magnitude of the urging force of the torsion coil spring 53 is sufficient to restore the rocking body 50 rotated in the direction of the arrow A from the neutral position. The swinging body 50 is set to a size that does not allow the swinging body 50 to rotate in the direction of arrow B beyond the neutral position against the urging force. The rotation is free in any direction, but when the external force is released, the swinging body 50 is automatically returned to and held at the neutral position by the action of each spring.

A protruding portion 50c is provided near the supporting portion of the rocking body 50.
Is formed, and when the rocking body 50 is in the neutral position,
An optical sensor similar to the optical sensor shown in FIG. 1 is incorporated in the main body 64 so as to oppose the portion where the projection 50c is located.

When the transfer member (not shown) is transferred in the direction shown by the arrow 57, the transfer member is moved in the course of this transfer.
After applying an external force to apply a tilt to give an inclination, it is released and passes. In other words, the oscillator 50 is caused to rotate about the shaft 51, the oscillator from the optical axis of the optical sensor detects the passage of the outer are and the conveying member. Further, when the transfer body moves further and the transfer body comes off the rocking body, the external force of the transfer body is released, and the rocking body automatically returns to the neutral position.

In this embodiment, since the oscillating body is not a roof-shaped member as in the prior art but is constituted by a bar-shaped member, it does not occupy a large space as in the prior art, and a small-sized device can be constructed with a simple configuration. As a matter of course, there is an advantage that can be achieved, and since the torsion coil spring is used, the biasing to the oscillator can be properly performed.

Example 3 FIGS. 4 (a), 4 (b), and 4 (c) show the structure of a reciprocating transfer body detecting mechanism according to this example.
FIG. 4B is a front view of a detection mechanism of the reciprocating transfer body, and FIG.
FIG. 4A is a sectional view taken along line LL in FIG.
It is R sectional drawing. In this example, the basic configuration is basically the same as the configuration of the embodiment of Example 2 described with reference to FIGS. 2 and 3, and has a common member. The same reference numerals as those in FIG. 3 denote the same parts, and a description thereof will be omitted.
4A and 4C, reference numeral 100 denotes an optical axis of the optical sensor.

2. Relationship between embodiment and claims (1). Relationship Between Each Embodiment and Claim 2 Since the relationship between each embodiment and claim 1 has been described in each embodiment, the relationship between each embodiment and claim 2 will be described below.

The oscillating body 10 in FIG. 1 and the oscillating body 50 in FIGS. 2 to 4 constitute a detection lever supported so as to be rotatable in forward and reverse directions. The top of the rocking body 10 in FIG. 1 and the top of the rocking body 50 in FIG. 2 to FIG. 4 constitute an engaging portion that engages with the transfer body that is reciprocated on the transfer path. The portion below the shaft 11 of the oscillating body 10 in FIG. 1 and the protrusion 50c of the oscillating body 50 in FIGS. 2 to 4 constitute a detection unit that cooperates with a sensor that detects the transfer of the transfer body. The sensor is not limited to the optical sensor, but may be a non-contact type magnetic sensor or another sensor, or a mechanical micro switch may be used.

The leaf spring 12 in FIG. 1 and the torsion coil spring 52 in FIGS. 2 to 4 bias the detection lever in both forward and reverse directions, and have a first elastic body having a strong urging force. Make up>. Similarly, the leaf spring 13 in FIG. 1 and the torsion coil spring 53 in FIGS. 2 to 4 constitute a second elastic body having a weak urging force.

The end of the leaf spring 12 in FIG. 1 and the other end 52b of the torsion coil spring 52 in FIGS.
And a locking portion formed at one end of the elastic body. The stopper 15 in FIG. 1 and the stopper 64 in FIGS.
b constitutes a fixed stopper portion.

Therefore, "the locking portion formed at one end of the first elastic body is brought into contact with the fixed stopper portion" means that in the example of FIG. It means that the end of the leaf spring is in contact with the stopper 15 while keeping the elasticity across the region.
2 to 4, the other end 5 of the torsion coil spring 52
2b traverses the first locking projection and abuts the stopper 64b in a state where the elasticity is maintained.

[0038] The term "one end of the detection lever the locking portion was more abut against the urging force of the second elastic element", in the example of Figure 1,
The middle part of the oscillator 10 is attached to the middle part of the leaf spring 12
Contact by the urging force. In the examples of FIGS. 2 to 4, it means that the first locking projection 50 a is brought into contact with the other end 52 b by the urging force of the torsion coil spring 53.

(2). Relationship between Embodiments and Claim 3 The transfer body includes a magnetic card used for a card reader and a card as another information medium. In addition, an object that is reciprocated on a fixed transfer path can be widely included.

(3). Relationship between Embodiments and Claim 4 When the transfer body is a card, an optical sensor is used as the sensor. The sensor is not limited to the optical sensor, but may be a non-contact type magnetic sensor or another sensor.
Alternatively, a mechanical microswitch can be used.

3. Advantages of each embodiment Since the rotation of the oscillating body is in the forward and reverse directions, the oscillating body can be made smaller, and the operating range becomes smaller, so that restrictions on sensor arrangement are reduced.

[0042] Since the swinging member can be held in the neutral position by the strength of the second urging means, the mechanism is simple and the cost is low.

. The mechanism of each example has the optical axis of the optical sensor installed outside the transporting body traveling part, and is resistant to dirt such as dust. Therefore, sensor sensitivity maintenance is not required, and the card reader detects the card by means of the card. When it is applied to (1), the size of the device can be reduced.

[0044]

According to the present invention, it is possible to easily and compactly hold the rocking body at the neutral position, and to provide a downsized reciprocating body detecting mechanism.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part for describing a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part illustrating a second embodiment of the present invention.

FIG. 3 is an exploded perspective view of a main part for describing a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a third embodiment of the present invention.

FIG. 5 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Oscillator 12 Leaf spring (as a 1st urging means) 13 Leaf spring (as a 2nd urging means) 15 Stopper 50 Oscillator 52 Torsional coil spring 53 (as a 1st urging means) Torsion coil spring 64b as second biasing means stopper

Claims (4)

(57) [Claims] A swinging member having an intermediate position supported by a stationary member so as to be swingable by a supporting portion; and a first biasing member for rotating the swinging member in a first direction about the supporting portion. Urging means; second urging means for rotationally urging the swinging body about the support portion in a second direction opposite to the first direction; and the first urging means. A stopper that limits a range to which the urging force of the urging means reaches within a region in the second direction around a neutral position of the oscillating body in a oscillating range of the oscillating body around the support portion. And the magnitude of the urging force of the second urging means is sufficient to restore the rocking body rotated in the first direction from the neutral position. A size that does not allow the swinging body to rotate in the second direction beyond the neutral position against the urging force of the urging means; A neutral position holding mechanism for an oscillating body, characterized in that the mechanism is set to: 2. An apparatus according to claim 1, further comprising: an engaging portion for engaging a transfer body reciprocally transferred on the transfer path, and a detection unit for cooperating with a sensor for detecting the transfer of the transfer body. A first elastic body having a strong urging force, and a second elastic body having a weak urging force, for urging the detection lever in both forward and reverse directions. A locking portion formed at one end of the first elastic body is brought into contact with the fixed stopper portion, and one end of the detection lever is brought into contact with the locking portion by the urging force of the second elastic body; A reciprocating transfer body detection mechanism, characterized in that: 3. The reciprocating transporter detecting mechanism according to claim 2, wherein the transporter is a card. 4. A reciprocating body detecting mechanism according to claim 2, wherein the sensor is an optical sensor.